Dec. 01, 2008
Nanomaterials for Sustainable Energy: The atomic structure of nanomaterials and the energy needed for their function can be optimised by a fundamental understanding of catalytic behaviour of nanoparticles and of the physical, atomic-level properties of materials for solar cells, fuel cells and light sources. This requires advanced tools that can see down to the individual atoms and sense their chemical environment, show information in three dimensions and allow experiments in situ to follow specific reactions. moreDec. 01, 2008
Zeolites: Highly Resolving Electron Microscopy & Digital Image Processing - Hardly anyone knows what they're called. And we use them every day, even though we may not know it. We're talking about zeolites, a group of minerals with extraordinary and outstanding properties. Since being discovered in 1756, zeolites have been a focus of research. There was a real run on them starting in 1920 once it became possible to decode the crystalline structure of natural zeolites. moreNov. 01, 2008
During the last decade microscopy has gone through a series of major improvements. The demand of microscopy technique has increased a lot and has brought the limits in optical resolution of light microscopes, as described by Ernst Abbe, to be extended by new technologies like 4Pi, STED , deconvolution and others. Scientists want to resolve small compartments and structures within a cell and but at the same time need to visualize a large field of view to be able to understand the complexity of biological organisms. moreNov. 01, 2008
Airborne microorganisms are ubiquitously present in various indoor and outdoor environments. The potential implication of fungal contaminants in bio-aerosols on occupational health is recognized as a problem in several working environments. There is a concern on the exposure of workers to bio-aerosols especially in composting facilities, in agriculture, and in municipal waste treatment. The European Commission has therefore guiding rules protecting employees in the workplace from airborne biological hazards. moreNov. 01, 2008
Coherent anti-Stokes Raman scattering (CARS) microscopy is a branch of nonlinear microscopy that allows chemical imaging of targeted vibrational transitions in unstained samples. A resonantly enhanced blue-shifted CARS signal is generated from NIR or visible light, thus the method is more sensitive than normal Raman microscopy and offers better resolution than IR microscopy. CARS microscopes are mostly set up as confocal scanning microscopes, but wide-field approaches are possible as well.
Brief Introduction to CARS-microscopy moreNov. 01, 2008
Combining electron backscatter diffraction (EBSD), a scanning electron microscope (SEM) and a focused ion beam (FIB) together into a single instrument enables three dimensional (3D) characterization of microstructure in crystalline materials. Combining these techniques together has enormous potential in materials science.
Electron Backscatter Diffraction
Traditionally, microstructure refers to features that are visually evident in an optical or electron microscope. However, many critical aspects of microstructure are not visually evident. moreNov. 01, 2008
Ultrasonic AFM may improve fabrication technologies on the nanometer scale. In the presence of ultrasonic vibration, hard surfaces can be indented and scratched with the tip of a soft cantilever, due to its inertia. Ultrasound reduces or even eliminates friction, and hence modifies the tip-nanoparticle-surface interactions in AFM manipulation. The subsurface sensitivity of the technique makes feasible the purposed manipulation of subsurface nanoscale features by ultrasonic actuation.
Ultrasonic Atomic Force Microscopies moreNov. 01, 2008
Focused Ion Beam instruments (FIB) are used for the preparation of electron microscopy specimens and for the fabrication of nano and micro components. Using polycrystalline Cu as an example, the influence of the crystallographic orientation, as obtained by EBSD, on the milling result is demonstrated. Different milling rates are due to the channeling effect. With some orientations a topography with characteristic features, like ripples, is generated, which were quantified using AFM images.